code: def test_various_types(self):
      self.assertFalse(tensor_util.is_ref(0.0))
      self.assertFalse(tensor_util.is_ref([tf.Variable(0.0)]))  # Note!
      self.assertFalse(tensor_util.is_ref(np.array(0.0, np.float32)))
      self.assertFalse(tensor_util.is_ref(tf.constant(0.0)))
      self.assertTrue(tensor_util.is_ref(FakeModule(0.0)))
      self.assertTrue(tensor_util.is_ref(FakeModule(tf.Variable(0.0))))
      self.assertTrue(tensor_util.is_ref(tf.Variable(0.0)))
  
imports: import numpy
  import tensorflow.compat.v2
  from tensorflow_probability.python.bijectors import scale
  from tensorflow_probability.python.distributions import normal
  from tensorflow_probability.python.internal import tensor_util
  from tensorflow_probability.python.internal import test_util
  from tensorflow_probability.python.util import deferred_tensor
label_desc: Use image node_id 1 for calling the IsRefTest obj's underlying member method code with example usage: obj.test_various_types() without return types